What is a transaction snapshot?

What is a transaction snapshot?

A transaction snapshot gives you a cross-tier view of the processing flow for a single invocation of a transaction. Call drill downs, where available, detail key information including slowest methods, errors, and remote service calls for the transaction execution on a tier.

What is transaction isolation level snapshot?

Snapshot Isolation Level Extensions SNAPSHOT isolation specifies that data read within a transaction will never reflect changes made by other simultaneous transactions. The transaction uses the data row versions that exist when the transaction begins.

How do I create a snapshot agent?

Create snapshot

1. Connect to the Publisher in Management Studio, and then expand the server node.
2. Expand the Replication folder, and then expand the Local Publications folder.
3. Right-click the publication for which you want to create a snapshot, and then click View Snapshot Agent Status.

When to create a snapshot of a transaction?

When specified, all participating storage engines and binary log instead of creating a new snapshot of data (or binary log coordinates), create a copy of the snapshot which has been created by an active transaction in the specified session. session_id is the session identifier reported in the Id column of SHOW PROCESSLIST.

How to create a database snapshot in Transact-SQL?

The only way to create a SQL Server database snapshot is to use Transact-SQL. SQL Server Management Studio does not support the creation of database snapshots. The source database, which can use any recovery model, must meet the following prerequisites: The server instance must be running an edition of SQL Server that supports database snapshot.

How to create a database snapshot on a mirror database?

To create a database snapshot on a mirror database, the database must be in the synchronized mirroring state. The source database cannot be configured as a scalable shared database. The source database must not contain a MEMORY_OPTIMIZED_DATA filegroup. For more information, see Unsupported SQL Server Features for In-Memory OLTP.

Where do I Run SQL Server snapshot agent?

Run the Snapshot Agent from the command prompt or from SQL Server Management Studio. For more information about running agents, see Replication Agent Executables Concepts and Start and Stop a Replication Agent (SQL Server Management Studio). For merge replication, a snapshot is generated every time the Snapshot Agent runs.